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Had just started using my PC when a popup showed urging me to update Adobe Flash, showing "adobe flash player.exe" as the file name (there is the possibility that it was "adobe flash updater.exe"). I clicked cancel, and then I started seeing really heavy internet usage. I installed & ran Malwarebytes which found and quarantined a number of "Trojans" and also blocked my PC from accessing a number of websites it was trying to connect to without my doing anything. I restarted my PC, ran MB again and more Trojans found, did it again and nothing found, but my PC is still acting the same, whenever it's connected to the internet really heavy usage starts up without me opening or doing anything. And even when not connected it's very slow now.

If the solution is very complex, I would rather just format it as I have nothing I need on it. I have read online about this virus and it seems like I might have some problems. Any advice?

Thank you for your response noknojon, however I feel I was not clear enough in my description. I went ahead and re-wrote my original post. If you would please, scroll up and re-read it, perhaps it will be clearer now.